/* ===================

AX2E (AXESCON XACML 2.0 Engine) is the Java authorization engine, which implements OASIS XACML 2.0 standard.
Copyright (C) 2007 AXESCON LLC

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA


Contact: AXESCON LLC - info{at}axescon.com

 =================== */
package axescon.xacml.engine.fn;

import axescon.xacml.api.*;
import axescon.xacml.model.policy.AttributeValue;
import axescon.xacml.model.shared.attr.BooleanAttribute;

/**
 * @author Date: Sep 28, 2005
 *         Responsibilities: abstract class for boolean match functions.
 */
public abstract class FnBaseBoolean extends AbstractFn implements MatchFn,Fn,BooleanFn {
    {
        dataTypes = new Class[]{BooleanAttribute.class};
    }

    public int getArgTypeListLength() {
        return 1;
    }


    public int getMinArgListLength() {
        return 0;
    }

    public Liquid exec(Liquid[] args) {

        boolean[] newArgs = new boolean[args.length];
        for (int i = 0; i < args.length; i++) {
            newArgs[i] = ((BooleanAttribute) args[i].getValue()).getValue();
        }

        return new Liquid(new BooleanAttribute(exec(newArgs)));
    }


    public boolean match(AttributeValue arg0, AttributeValue arg1) {
        return ((BooleanAttribute) exec(new Liquid[]{new Liquid(arg0), new Liquid(arg1)}).getValue()).getValue();
    }

    public Class getReturnDataType() {
        return super.getBooleanReturnDataType();
    }

    public void setDataTypes(Class[] dataTypes) throws XacmlException {
        throw new XacmlException(getClass().getName()+" doesnt take args ",XacmlException.ERR_CODE_CONFIG_FN_WRONG_ARG_LIST);
    }

}
